Improvement in dirk-knives



UNITED STATES PATENT OFFICE.

ANTON HENINGER, OF NEW HAVEN, CONNECTICUT.

IMPROVEMENT IN DIRK-KNIVES.

Specification forming part of Letters Patent No. 48,685, dated July `11, 1865.

To all whom it may concern:

Be it known that I, ANTON HENINGER, of the city and county ot' New Haven, in the State of Connecticut,haveinventeda new .and useful Improvement in Dirk-Knives; and I do hereby declare that the following is a full, clear, and exact description of the construction, character, and operation of the same, reference being had to the accompanying drawings, which make part of this specification, in which- Figure 1 is a perspective view of the open knife, with a part otl the handle, &c., broken away, showing the position and form of the bent projection on the sprin got' the dirk-blade.

Fig. 2 is a perspective view of the dirk-blade, showing the notch in the heel or rear end ot' the blade, into which the projection or hook at the end of the spring falls to lock itopen. Fig. 3 is a perspective View of the spring of the dirk-blade, showing the projection or hook at the end which locks into the notch in the dirkblade to hold it open and the bent projection on which the shoulder ot' the small blade presses to force the spring back to unlock the dirkblade.

My improvement consists in making the spring of the dirk-blade with a locking projection or hook at the end, similar to that which has been heretofore used for locking the blade f open, and another projection, on the bent end of which the shoulder of the small blade may be pressed to unlock the dirk-blade and allow it to be shutwith ease and convenience.

I make the handle A, Fig. 1, of anyconvenient material and shape, in the usual way for two or more springs, and to receive two blades at one end, while the other end may or may not have a blade or blades inserted.

I make the dirk-blade of cast-steel or any other suitable material, substantially of the shape shown in Fig. 2, and atB, Fig. 1, witha notch or recessin theback part of the thick end or shoulder, as shown at a, Fig. 2, to receive the projection or hook b,.Fig. 3, at the end of the spring g, which will lock the dirk-blade open.

I make the small blade C of cast-steel or any other suitable material, substantially in the form shown at C d, Fig. 1, and as indicated in dots at C d-that is, with a narrow blade, C,

and an unusually large and long shoulder or thick part, as shown at d and df, Fig. 1, for

the purpose of reaching to and resting on the bent projection c of the spring g, Figs. l and 3, so that the blade O d may serve as a lever to force the spring g, Figs. 1 and 3, downward to unlock the dirk-blade and allow it to shut. I make the spring c e of the small blade O d ot' the usual shape, as indicated in Fig. 1, par` tially broken away.

I make the spring for the dirk-blade of caststeel or any other suitable material, substantially in the shape or form shown in Fig. 3,

that when the blade C is shut its shoulden l will rest on the projection c, as indicated by` dots; and then, when the inner end or point ofthe blade C is pressed down between the sides or scales of the handle A, its shoulder or thick part d will press ou the projection c and force down the spring g, Figs. l and 3, so as to unlock the dirk-blade B and allow it to be shut in the usual way.

Having made the parts of the knife as bef'ore described, I assemble the parts or put them together in the usual way, as indicated in Fig. 1. I then shut the blade O, when it will be substantially in the position indicated by the'dots in Fig. .1; and when I wish to shut the dirk-blade I place my finger or thumb on the back of the small blade, as at C', and torce it down until the shoulder d, as at d', by acting on lthe bent projection c, will force down the spring g so as to draw the projection or hook b, Fig. 3, out of the notch or space a, Fig. 2, when the dirk-blade B may be conveniently closed or shut in the usual way.

What I claim as my invention, and desire to secure by Letters Paten t, is

The combination of the two blades B and C with the spring g, when the parts are constructed, arranged, and fitted for use substantially as herein described.

ANTON HENINGER.

Witnesses:

R. FITZGERALD, JAs. A. AUSTIN.' 

